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Parse non-conformant records from Access export

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SheetJS 2022-02-08 04:50:51 -05:00
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@ -49,6 +49,7 @@ SessionStorage
SQLite
SystemJS
VueJS
WebKit
WebSQL
WK_
iOS

580
README.md
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@ -44,19 +44,16 @@ port calculations to web apps; automate common spreadsheet tasks, and much more!
* [JS Ecosystem Demos](#js-ecosystem-demos)
- [Acquiring and Extracting Data](#acquiring-and-extracting-data)
* [Parsing Workbooks](#parsing-workbooks)
+ [API](#api)
+ [Examples](#examples)
* [Processing JSON and JS Data](#processing-json-and-js-data)
+ [API](#api-1)
+ [Examples](#examples-1)
* [Processing HTML Tables](#processing-html-tables)
+ [API](#api-2)
+ [Examples](#examples-2)
- [Working with the Workbook](#working-with-the-workbook)
* [Parsing and Writing Examples](#parsing-and-writing-examples)
- [Writing Workbooks](#writing-workbooks)
- [Packaging and Releasing Data](#packaging-and-releasing-data)
* [Writing Workbooks](#writing-workbooks)
* [Writing Examples](#writing-examples)
* [Streaming Write](#streaming-write)
* [Generating JSON and JS Data](#generating-json-and-js-data)
* [Generating HTML Tables](#generating-html-tables)
- [Interface](#interface)
* [Parsing functions](#parsing-functions)
* [Writing functions](#writing-functions)
@ -263,7 +260,6 @@ and approaches for steps 1 and 5.
Utility functions help with step 3.
### The Zen of SheetJS
_Data processing should fit in any workflow_
@ -525,7 +521,7 @@ Other examples are included in the [showcase](demos/showcase/).
### Parsing Workbooks
#### API
**API**
_Extract data from spreadsheet bytes_
@ -550,7 +546,7 @@ security risk), and attempts to read files in this way will throw an error.
The second `opts` argument is optional. ["Parsing Options"](#parsing-options)
covers the supported properties and behaviors.
#### Examples
**Examples**
Here are a few common scenarios (click on each subtitle to see the code):
@ -565,7 +561,7 @@ var XLSX = require("xlsx");
var workbook = XLSX.readFile("test.xlsx");
```
For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
should be used to read the file data as a `Buffer` for use with `XLSX.read`:
```js
@ -946,8 +942,6 @@ const workbook = XLSX.read(data);
</details>
More detailed examples are covered in the [included demos](demos/)
### Processing JSON and JS Data
JSON and JS data tend to represent single worksheets. This section will use a
@ -973,7 +967,7 @@ The third argument specifies the desired worksheet name. Multiple worksheets can
be added to a workbook by calling the function multiple times.
#### API
**API**
_Create a worksheet from an array of arrays of JS values_
@ -1011,17 +1005,68 @@ control the column order and header output.
["Array of Objects Input"](#array-of-arrays-input) describes the function and
the optional `opts` argument in more detail.
#### Examples
**Examples**
["Zen of SheetJS"](#the-zen-of-sheetjs) contains a detailed example "Get Data
from a JSON Endpoint and Generate a Workbook"
[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
data grid for previewing and modifying structured data in the web browser. The
[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
`xtos` function for converting from x-spreadsheet data object to a workbook.
<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
<details>
<summary><b>Records from a database query (SQL or no-SQL)</b> (click to show)</summary>
The [`database` demo](/demos/database/) includes examples of working with
databases and query results.
</details>
<details>
<summary><b>Numerical Computations with TensorFlow.js</b> (click to show)</summary>
[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
arrays, well-suited for worksheets where each column is a data vector. That is
the transpose of how most people use spreadsheets, where each row is a vector.
When recovering data from `tfjs`, the returned data points are stored in a typed
array. An array of arrays can be constructed with loops. `Array#unshift` can
prepend a title row before the conversion:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
/* suppose xs and ys are vectors (1D tensors) -> tfarr will be a typed array */
const tfdata = tf.stack([xs, ys]).transpose();
const shape = tfdata.shape;
const tfarr = tfdata.dataSync();
/* construct the array of arrays */
const aoa = [];
for(let j = 0; j < shape[0]; ++j) {
aoa[j] = [];
for(let i = 0; i < shape[1]; ++i) aoa[j][i] = tfarr[j * shape[1] + i];
}
/* add headers to the top */
aoa.unshift(["x", "y"]);
/* generate worksheet */
const worksheet = XLSX.utils.aoa_to_sheet(aoa);
```
The [`array` demo](demos/array/) shows a complete example.
</details>
### Processing HTML Tables
#### API
**API**
_Create a worksheet by scraping an HTML TABLE in the page_
@ -1049,7 +1094,7 @@ The options argument supports the same options as `table_to_sheet`, with the
addition of a `sheet` property to control the worksheet name. If the property
is missing or no options are specified, the default name `Sheet1` is used.
#### Examples
**Examples**
Here are a few common scenarios (click on each subtitle to see the code):
@ -1130,6 +1175,116 @@ chrome.runtime.onMessage.addListener(function(msg, sender, cb) {
</details>
<details>
<summary><b>Server-Side HTML Tables with Headless Chrome</b> (click to show)</summary>
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks. The core idea is to add the script to the page, parse
the table in the page context, generate a `base64` workbook and send it back
for further processing:
```js
const XLSX = require("xlsx");
const { readFileSync } = require("fs"), puppeteer = require("puppeteer");
const url = `https://sheetjs.com/demos/table`;
/* get the standalone build source (node_modules/xlsx/dist/xlsx.full.min.js) */
const lib = readFileSync(require.resolve("xlsx/dist/xlsx.full.min.js"), "utf8");
(async() => {
/* start browser and go to web page */
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto(url, {waitUntil: "networkidle2"});
/* inject library */
await page.addScriptTag({content: lib});
/* this function `s5s` will be called by the script below, receiving the Base64-encoded file */
await page.exposeFunction("s5s", async(b64) => {
const workbook = XLSX.read(b64, {type: "base64" });
/* DO SOMETHING WITH workbook HERE */
});
/* generate XLSB file in webpage context and send back result */
await page.addScriptTag({content: `
/* call table_to_book on first table */
var workbook = XLSX.utils.table_to_book(document.querySelector("TABLE"));
/* generate XLSX file */
var b64 = XLSX.write(workbook, {type: "base64", bookType: "xlsb"});
/* call "s5s" hook exposed from the node process */
window.s5s(b64);
`});
/* cleanup */
await browser.close();
})();
```
</details>
<details>
<summary><b>Server-Side HTML Tables with Headless WebKit</b> (click to show)</summary>
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). The core idea
is to add the script to the page, parse the table in the page context, generate
a `binary` workbook and send it back for further processing:
```js
var XLSX = require('xlsx');
var page = require('webpage').create();
/* this code will be run in the page */
var code = [ "function(){",
/* call table_to_book on first table */
"var wb = XLSX.utils.table_to_book(document.body.getElementsByTagName('table')[0]);",
/* generate XLSB file and return binary string */
"return XLSX.write(wb, {type: 'binary', bookType: 'xlsb'});",
"}" ].join("");
page.open('https://sheetjs.com/demos/table', function() {
/* Load the browser script from the UNPKG CDN */
page.includeJs("https://unpkg.com/xlsx/dist/xlsx.full.min.js", function() {
/* The code will return an XLSB file encoded as binary string */
var bin = page.evaluateJavaScript(code);
var workbook = XLSX.read(bin, {type: "binary"});
/* DO SOMETHING WITH workbook HERE */
phantom.exit();
});
});
```
</details>
<details>
<summary><b>NodeJS HTML Tables without a browser</b> (click to show)</summary>
NodeJS does not include a DOM implementation and Puppeteer requires a hefty
Chromium build. [`jsdom`](https://npm.im/jsdom) is a lightweight alternative:
```js
const XLSX = require("xlsx");
const { readFileSync } = require("fs");
const { JSDOM } = require("jsdom");
/* obtain HTML string. This example reads from test.html */
const html_str = fs.readFileSync("test.html", "utf8");
/* get first TABLE element */
const doc = new JSDOM(html_str).window.document.querySelector("table");
/* generate workbook */
const workbook = XLSX.utils.table_to_book(doc);
```
</details>
## Working with the Workbook
The full object format is described later in this README.
@ -1213,37 +1368,82 @@ Some helper functions in `XLSX.utils` generate different views of the sheets:
- `XLSX.utils.sheet_to_json` generates an array of objects
- `XLSX.utils.sheet_to_formulae` generates a list of formulae
## Writing Workbooks
## Packaging and Releasing Data
For writing, the first step is to generate output data. The helper functions
`write` and `writeFile` will produce the data in various formats suitable for
dissemination. The second step is to actual share the data with the end point.
Assuming `workbook` is a workbook object:
### Writing Workbooks
<details>
<summary><b>nodejs write a file</b> (click to show)</summary>
**API**
`XLSX.writeFile` uses `fs.writeFileSync` in server environments:
_Generate spreadsheet bytes (file) from data_
```js
if(typeof require !== 'undefined') XLSX = require('xlsx');
var data = XLSX.write(workbook, opts);
```
The `write` method attempts to package data from the workbook into a file in
memory. By default, XLSX files are generated, but that can be controlled with
the `bookType` property of the `opts` argument. Based on the `type` option,
the data can be stored as a "binary string", JS string, `Uint8Array` or Buffer.
The second `opts` argument is required. ["Writing Options"](#writing-options)
covers the supported properties and behaviors.
_Generate and attempt to save file_
```js
XLSX.writeFile(workbook, filename, opts);
```
The `writeFile` method packages the data and attempts to save the new file. The
export file format is determined by the extension of `filename` (`SheetJS.xlsx`
signals XLSX export, `SheetJS.xlsb` signals XLSB export, etc).
The `writeFile` method uses platform-specific APIs to initiate the file save. In
NodeJS, `fs.readFileSync` can create a file. In the web browser, a download is
attempted using the HTML5 `download` attribute, with fallbacks for IE.
The second `opts` argument is optional. ["Writing Options"](#writing-options)
covers the supported properties and behaviors.
**Examples**
<details>
<summary><b>Local file in a NodeJS server</b> (click to show)</summary>
`writeFile` uses `fs.writeFileSync` in server environments:
```js
var XLSX = require("xlsx");
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsb');
/* at this point, out.xlsb is a file that you can distribute */
XLSX.writeFile(workbook, "out.xlsb");
```
For Node ESM, the `writeFile` helper is not enabled. Instead, `fs.writeFileSync`
should be used to write the file data to a `Buffer` for use with `XLSX.write`:
```js
import { writeFileSync } from "fs";
import { write } from "xlsx/xlsx.mjs";
const buf = write(workbook, {type: "buffer", bookType: "xlsb"});
/* buf is a Buffer */
const workbook = writeFileSync("out.xlsb", buf);
```
</details>
<details>
<summary><b>Photoshop ExtendScript write a file</b> (click to show)</summary>
<summary><b>Local file in a PhotoShop or InDesign plugin</b> (click to show)</summary>
`writeFile` wraps the `File` logic in Photoshop and other ExtendScript targets.
The specified path should be an absolute path:
```js
#include "xlsx.extendscript.js"
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsx');
XLSX.writeFile(workbook, "out.xlsx");
/* at this point, out.xlsx is a file that you can distribute */
```
@ -1252,44 +1452,7 @@ The [`extendscript` demo](demos/extendscript/) includes a more complex example.
</details>
<details>
<summary><b>Browser add TABLE element to page</b> (click to show)</summary>
The `sheet_to_html` utility function generates HTML code that can be added to
any DOM element.
```js
var worksheet = workbook.Sheets[workbook.SheetNames[0]];
var container = document.getElementById('tableau');
container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
```
</details>
<details>
<summary><b>Browser upload file (ajax)</b> (click to show)</summary>
A complete example using XHR is [included in the XHR demo](demos/xhr/), along
with examples for fetch and wrapper libraries. This example assumes the server
can handle Base64-encoded files (see the demo for a basic nodejs server):
```js
/* in this example, send a base64 string to the server */
var wopts = { bookType:'xlsx', bookSST:false, type:'base64' };
var wbout = XLSX.write(workbook,wopts);
var req = new XMLHttpRequest();
req.open("POST", "/upload", true);
var formdata = new FormData();
formdata.append('file', 'test.xlsx'); // <-- server expects `file` to hold name
formdata.append('data', wbout); // <-- `data` holds the base64-encoded data
req.send(formdata);
```
</details>
<details>
<summary><b>Browser save file</b> (click to show)</summary>
<summary><b>Download a file in the browser to the user machine</b> (click to show)</summary>
`XLSX.writeFile` wraps a few techniques for triggering a file save:
@ -1303,14 +1466,14 @@ There is no standard way to determine if the actual file has been downloaded.
```js
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsb');
XLSX.writeFile(workbook, "out.xlsb");
/* at this point, out.xlsb will have been downloaded */
```
</details>
<details>
<summary><b>Browser save file (compatibility)</b> (click to show)</summary>
<summary><b>Download a file in legacy browsers</b> (click to show)</summary>
`XLSX.writeFile` techniques work for most modern browsers as well as older IE.
For much older browsers, there are workarounds implemented by wrapper libraries.
@ -1320,7 +1483,7 @@ Note: `XLSX.writeFile` will automatically call `saveAs` if available.
```js
/* bookType can be any supported output type */
var wopts = { bookType:'xlsx', bookSST:false, type:'array' };
var wopts = { bookType:"xlsx", bookSST:false, type:"array" };
var wbout = XLSX.write(workbook,wopts);
@ -1333,11 +1496,11 @@ to generate local files, suitable for environments where ActiveX is unavailable:
```js
Downloadify.create(id,{
/* other options are required! read the downloadify docs for more info */
filename: "test.xlsx",
data: function() { return XLSX.write(wb, {bookType:"xlsx", type:'base64'}); },
append: false,
dataType: 'base64'
/* other options are required! read the downloadify docs for more info */
filename: "test.xlsx",
data: function() { return XLSX.write(wb, {bookType:"xlsx", type:"base64"}); },
append: false,
dataType: "base64"
});
```
@ -1345,6 +1508,54 @@ The [`oldie` demo](demos/oldie/) shows an IE-compatible fallback scenario.
</details>
<details>
<summary><b>Browser upload file (ajax)</b> (click to show)</summary>
A complete example using XHR is [included in the XHR demo](demos/xhr/), along
with examples for fetch and wrapper libraries. This example assumes the server
can handle Base64-encoded files (see the demo for a basic nodejs server):
```js
/* in this example, send a base64 string to the server */
var wopts = { bookType:"xlsx", bookSST:false, type:"base64" };
var wbout = XLSX.write(workbook,wopts);
var req = new XMLHttpRequest();
req.open("POST", "/upload", true);
var formdata = new FormData();
formdata.append("file", "test.xlsx"); // <-- server expects `file` to hold name
formdata.append("data", wbout); // <-- `data` holds the base64-encoded data
req.send(formdata);
```
</details>
<details>
<summary><b>PhantomJS (Headless Webkit) File Generation</b> (click to show)</summary>
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). PhantomJS
`fs.write` supports writing files from the main process but has a different
interface from the NodeJS `fs` module:
```js
var XLSX = require('xlsx');
var fs = require('fs');
/* generate a binary string */
var bin = XLSX.write(workbook, { type:"binary", bookType: "xlsx" });
/* write to file */
fs.write("test.xlsx", bin, "wb");
```
Note: The section ["Processing HTML Tables"](#processing-html-tables) shows how
to generate a workbook from HTML tables in a page in "Headless WebKit".
</details>
The [included demos](demos/) cover mobile apps and other special deployments.
### Writing Examples
@ -1391,6 +1602,223 @@ stream.pipe(conv); conv.pipe(process.stdout);
<https://github.com/sheetjs/sheetaki> pipes write streams to nodejs response.
### Generating JSON and JS Data
JSON and JS data tend to represent single worksheets. The utility functions in
this section work with single worksheets.
The ["Common Spreadsheet Format"](#common-spreadsheet-format) section describes
the object structure in more detail. `workbook.SheetNames` is an ordered list
of the worksheet names. `workbook.Sheets` is an object whose keys are sheet
names and whose values are worksheet objects.
The "first worksheet" is stored at `workbook.Sheets[workbook.SheetNames[0]]`.
**API**
_Create an array of JS objects from a worksheet_
```js
var jsa = XLSX.utils.sheet_to_json(worksheet, opts);
```
_Create an array of arrays of JS values from a worksheet_
```js
var aoa = XLSX.utils.sheet_to_json(worksheet, {...opts, header: 1});
```
The `sheet_to_json` utility function walks a workbook in row-major order,
generating an array of objects. The second `opts` argument controls a number of
export decisions including the type of values (JS values or formatted text). The
["JSON"](#json) section describes the argument in more detail.
By default, `sheet_to_json` scans the first row and uses the values as headers.
With the `header: 1` option, the function exports an array of arrays of values.
**Examples**
[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
data grid for previewing and modifying structured data in the web browser. The
[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
`stox` function for converting from a workbook to x-spreadsheet data object.
<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
<details>
<summary><b>Populating a database (SQL or no-SQL)</b> (click to show)</summary>
The [`database` demo](/demos/database/) includes examples of working with
databases and query results.
</details>
<details>
<summary><b>Numerical Computations with TensorFlow.js</b> (click to show)</summary>
[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
arrays, well-suited for worksheets where each column is a data vector. That is
the transpose of how most people use spreadsheets, where each row is a vector.
A single `Array#map` can pull individual named rows from `sheet_to_json` export:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
const key = "age"; // this is the field we want to pull
const ages = XLSX.utils.sheet_to_json(worksheet).map(r => r[key]);
const tf_data = tf.tensor1d(ages);
```
All fields can be processed at once using a transpose of the 2D tensor generated
with the `sheet_to_json` export with `header: 1`. The first row, if it contains
header labels, should be removed with a slice:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
/* array of arrays of the data starting on the second row */
const aoa = XLSX.utils.sheet_to_json(worksheet, {header: 1}).slice(1);
/* dataset in the "correct orientation" */
const tf_dataset = tf.tensor2d(aoa).transpose();
/* pull out each dataset with a slice */
const tf_field0 = tf_dataset.slice([0,0], [1,tensor.shape[1]]).flatten();
const tf_field1 = tf_dataset.slice([1,0], [1,tensor.shape[1]]).flatten();
```
The [`array` demo](demos/array/) shows a complete example.
</details>
### Generating HTML Tables
**API**
_Generate HTML Table from Worksheet_
```js
var html = XLSX.utils.sheet_to_html(worksheet);
```
The `sheet_to_html` utility function generates HTML code based on the worksheet
data. Each cell in the worksheet is mapped to a `<TD>` element. Merged cells
in the worksheet are serialized by setting `colspan` and `rowspan` attributes.
**Examples**
The `sheet_to_html` utility function generates HTML code that can be added to
any DOM element by setting the `innerHTML`:
```js
var container = document.getElementById("tavolo");
container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
```
Combining with `fetch`, constructing a site from a workbook is straightforward:
<details>
<summary><b>Vanilla JS + HTML fetch workbook and generate table previews</b> (click to show)</summary>
```html
<body>
<style>TABLE { border-collapse: collapse; } TD { border: 1px solid; }</style>
<div id="tavolo"></div>
<script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>
<script type="text/javascript">
(async() => {
/* fetch and parse workbook -- see the fetch example for details */
const workbook = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
let output = [];
/* loop through the worksheet names in order */
workbook.SheetNames.forEach(name => {
/* generate HTML from the corresponding worksheets */
const worksheet = workbook.Sheets[name];
const html = XLSX.utils.sheet_to_html(worksheet);
/* add a header with the title name followed by the table */
output.push(`<H3>${name}</H3>${html}`);
});
/* write to the DOM at the end */
tavolo.innerHTML = output.join("\n");
})();
</script>
</body>
```
</details>
<details>
<summary><b>React fetch workbook and generate HTML table previews</b> (click to show)</summary>
It is generally recommended to use a React-friendly workflow, but it is possible
to generate HTML and use it in React with `dangerouslySetInnerHTML`:
```jsx
function Tabeller(props) {
/* the workbook object is the state */
const [workbook, setWorkbook] = React.useState(XLSX.utils.book_new());
/* fetch and update the workbook with an effect */
React.useEffect(() => { (async() => {
/* fetch and parse workbook -- see the fetch example for details */
const wb = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
setWorkbook(wb);
})(); });
return workbook.SheetNames.map(name => (<>
<h3>name</h3>
<div dangerouslySetInnerHTML={{
/* this __html mantra is needed to set the inner HTML */
__html: XLSX.utils.sheet_to_html(workbook.Sheets[name])
}} />
</>));
}
```
The [`react` demo](demos/react) includes more React examples.
</details>
<details>
<summary><b>VueJS fetch workbook and generate HTML table previews</b> (click to show)</summary>
It is generally recommended to use a VueJS-friendly workflow, but it is possible
to generate HTML and use it in VueJS with the `v-html` directive:
```jsx
import { read, utils } from 'xlsx';
import { reactive } from 'vue';
const S5SComponent = {
mounted() { (async() => {
/* fetch and parse workbook -- see the fetch example for details */
const workbook = read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
/* loop through the worksheet names in order */
workbook.SheetNames.forEach(name => {
/* generate HTML from the corresponding worksheets */
const html = utils.sheet_to_html(workbook.Sheets[name]);
/* add to state */
this.wb.wb.push({ name, html });
});
})(); },
/* this state mantra is required for array updates to work */
setup() { return { wb: reactive({ wb: [] }) }; },
template: `
<div v-for="ws in wb.wb" :key="ws.name">
<h3>{{ ws.name }}</h3>
<div v-html="ws.html"></div>
</div>`
};
```
The [`vuejs` demo](demos/vue) includes more React examples.
</details>
## Interface
`XLSX` is the exposed variable in the browser and the exported node variable

3
bits/28_binstructs.js
View File

@ -132,8 +132,7 @@ function parse_RkNumber(data)/*:number*/ {
var b = data.slice(data.l, data.l + 4);
var fX100 = (b[0] & 1), fInt = (b[0] & 2);
data.l += 4;
b[0] &= 0xFC; // b[0] &= ~3;
var RK = fInt === 0 ? __double([0, 0, 0, 0, b[0], b[1], b[2], b[3]], 0) : __readInt32LE(b, 0) >> 2;
var RK = fInt === 0 ? __double([0, 0, 0, 0, (b[0] & 0xFC), b[1], b[2], b[3]], 0) : __readInt32LE(b, 0) >> 2;
return fX100 ? (RK / 100) : RK;
}
function write_RkNumber(data/*:number*/, o) {

2
bits/30_ctype.js
View File

@ -111,7 +111,7 @@ var ct2type/*{[string]:string}*/ = ({
/* VBA */
"application/vnd.ms-office.vbaProject": "vba",
"application/vnd.ms-office.vbaProjectSignature": "vba",
"application/vnd.ms-office.vbaProjectSignature": "TODO",
/* Volatile Dependencies */
"application/vnd.ms-office.volatileDependencies": "TODO",

8
bits/68_wsbin.js
View File

@ -244,6 +244,12 @@ function write_BrtShortRk(cell, ncell, o) {
return o;
}
/* [MS-XLSB] 2.4.323 BrtCellRString */
function parse_BrtCellRString(data) {
var cell = parse_XLSBCell(data);
var value = parse_RichStr(data);
return [cell, value, 'is'];
}
/* [MS-XLSB] 2.4.317 BrtCellSt */
function parse_BrtCellSt(data) {
@ -564,6 +570,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
case 0x0010: /* 'BrtShortReal' */
case 0x0011: /* 'BrtShortSt' */
case 0x0012: /* 'BrtShortIsst' */
case 0x003E: /* 'BrtCellRString' */
p = ({t:val[2]}/*:any*/);
switch(val[2]) {
case 'n': p.v = val[1]; break;
@ -571,6 +578,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
case 'b': p.v = val[1] ? true : false; break;
case 'e': p.v = val[1]; if(opts.cellText !== false) p.w = BErr[p.v]; break;
case 'str': p.t = 's'; p.v = val[1]; break;
case 'is': p.t = 's'; p.v = val[1].t; break;
}
if((cf = styles.CellXf[val[0].iStyleRef])) safe_format(p,cf.numFmtId,null,opts, themes, styles);
C = val[0].c == -1 ? C + 1 : val[0].c;

2
bits/77_parsetab.js
View File

@ -60,7 +60,7 @@ var XLSBRecordEnum = {
/*::[*/0x003A/*::]*/: { n:"BrtMdxMbrIstr" },
/*::[*/0x003B/*::]*/: { n:"BrtStr" },
/*::[*/0x003C/*::]*/: { n:"BrtColInfo", f:parse_ColInfo },
/*::[*/0x003E/*::]*/: { n:"BrtCellRString" },
/*::[*/0x003E/*::]*/: { n:"BrtCellRString", f:parse_BrtCellRString },
/*::[*/0x003F/*::]*/: { n:"BrtCalcChainItem$", f:parse_BrtCalcChainItem$ },
/*::[*/0x0040/*::]*/: { n:"BrtDVal", f:parse_BrtDVal },
/*::[*/0x0041/*::]*/: { n:"BrtSxvcellNum" },

3
bits/79_html.js
View File

@ -139,6 +139,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
or_R = _origin.r; or_C = _origin.c;
}
}
var rows/*:HTMLCollection<HTMLTableRowElement>*/ = table.getElementsByTagName('tr');
var sheetRows = Math.min(opts.sheetRows||10000000, rows.length);
var range/*:Range*/ = {s:{r:0,c:0},e:{r:or_R,c:or_C}};
@ -223,7 +224,7 @@ function is_dom_element_hidden(element/*:HTMLElement*/)/*:boolean*/ {
var display/*:string*/ = '';
var get_computed_style/*:?function*/ = get_get_computed_style_function(element);
if(get_computed_style) display = get_computed_style(element).getPropertyValue('display');
if(!display) display = element.style.display; // Fallback for cases when getComputedStyle is not available (e.g. an old browser or some Node.js environments) or doesn't work (e.g. if the element is not inserted to a document)
if(!display) display = element.style && element.style.display;
return display === 'none';
}

11
demos/headless/.eslintrc Normal file
View File

@ -0,0 +1,11 @@
{
"env": { "node":true },
"parserOptions": {
"ecmaVersion": 8
},
"rules": {
"no-var": 0,
"semi": [ 2, "always" ]
}
}

54
demos/headless/README.md
View File

@ -3,30 +3,42 @@
The library, eschewing unstable and nascent ECMAScript features, plays nicely
with most headless browsers. This demo shows a few common headless scenarios.
## PhantomJS
NodeJS does not ship with its own layout engine. For advanced HTML exports, a
headless browser is generally indistinguishable from a browser process.
This was tested in PhantomJS 2.1.1, installed using the node module:
## Chromium Automation with Puppeteer
[Puppeteer](https://npm.im/puppeteer) enables headless Chromium automation.
[`html.js`](./html.js) shows a dedicated script for converting an HTML file to
XLSB using puppeteer. The first argument is the path to the HTML file. The
script writes to `output.xlsb`:
```bash
# read from test.html and write to output.xlsb
$ node html.js test.html
```
The script pulls up the webpage using headless Chromium and adds a script tag
reference to the standalone browser build. That will make the `XLSX` variable
available to future scripts added in the page! The browser context is not able
to save the file using `writeFile`, so the demo generates the XLSB spreadsheet
bytes with the `base64` type, sends the string back to the main process, and
uses `fs.writeFileSync` to write the file.
## WebKit Automation with PhantomJS
This was tested using [PhantomJS 2.1.1](https://phantomjs.org/download.html)
```bash
$ npm install -g phantomjs
$ phantomjs phantomjs.js
```
## Chrome Automation
This was tested in puppeteer 0.9.0 (Chromium revision 494755) and `chromeless`:
```bash
$ npm install puppeteer
$ node puppeteer.js
$ npm install -g chromeless
$ node chromeless.js
```
Since the main process is node, the read and write features should be placed in
the webpage. The `dist` versions are suitable for web pages.
The flow is similar to the Puppeteer flow (scrape table and generate workbook in
website context, copy string back, write string to file from main process).
The `binary` type generates strings that can be written in PhantomJS using the
`fs.write` method with mode `"wb"`.
## wkhtmltopdf
@ -36,13 +48,5 @@ This was tested in wkhtmltopdf 0.12.4, installed using the official binaries:
$ wkhtmltopdf --javascript-delay 20000 http://oss.sheetjs.com/sheetjs/tests/ test.pdf
```
## SlimerJS
This was tested in SlimerJS 0.10.3 and FF 52.0, installed using `brew` on OSX:
```bash
$ brew install slimerjs
$ slimerjs slimerjs.js
```
[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)

9
demos/headless/chromeless.js
View File

@ -1,9 +0,0 @@
const { Chromeless } = require('chromeless');
const TEST = 'http://localhost:8000', TIME = 30 * 1000;
(async() => {
const browser = new Chromeless();
const pth = await browser.goto(TEST).wait(TIME).screenshot();
console.log(pth);
await browser.end();
})().catch(e=>{ console.error(e); });

51
demos/headless/html.js Executable file
View File

@ -0,0 +1,51 @@
#!/usr/bin/env node
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
const puppeteer = require("puppeteer");
const path = require("path");
const fs = require("fs");
/* inf is the path to the html file -> url is a file URL */
let inf = process.argv[2] || "test.html";
let htmlpath = path.join(__dirname, inf);
if(!fs.existsSync(htmlpath)) htmlpath = path.join(process.cwd(), inf);
if(!fs.existsSync(htmlpath)) htmlpath = path.resolve(inf);
if(!fs.existsSync(htmlpath)) { console.error(`Could not find a valid file for \`${inf}\``); process.exit(4); }
console.error(`Reading from ${htmlpath}`);
const url = `file://${htmlpath}`;
/* get the standalone build source (e.g. node_modules/xlsx/dist/xlsx.full.min.js) */
// const websrc = fs.readFileSync(require.resolve("xlsx/dist/xlsx.full.min.js"), "utf8");
const get_lib = (jspath) => fs.readFileSync(path.resolve(__dirname, jspath)).toString();
const websrc = get_lib("xlsx.full.min.js");
(async() => {
/* start browser and go to web page */
const browser = await puppeteer.launch();
const page = await browser.newPage();
page.on("console", msg => console.log("PAGE LOG:", msg.text()));
await page.setViewport({width: 1920, height: 1080});
await page.goto(url, {waitUntil: "networkidle2"});
/* inject library */
await page.addScriptTag({content: websrc});
/* this function `s5s` will be called by the script below, receiving the Base64-encoded file */
await page.exposeFunction("s5s", async(b64) => {
fs.writeFileSync("output.xlsb", b64, {encoding: "base64"});
});
/* generate XLSB file in webpage context and send back a Base64-encoded string */
await page.addScriptTag({content: `
/* call table_to_book on first table */
var wb = XLSX.utils.table_to_book(document.getElementsByTagName("TABLE")[0]);
/* generate XLSB file */
var b64 = XLSX.write(wb, {type: "base64", bookType: "xlsb"});
/* call "s5s" hook exposed from the node process */
window.s5s(b64);
`});
/* cleanup */
await browser.close();
})();

36
demos/headless/phantomjs.js
View File

@ -1,15 +1,35 @@
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
var fs = require('fs');
var xlsx = require('../../xlsx');
/* eslint-env phantomjs */
var XLSX = require('xlsx');
var page = require('webpage').create();
page.onConsoleMessage = function(msg) { console.log(msg); };
page.open('http://oss.sheetjs.com/sheetjs/tests/', function(status) {
/* this code will be run in the page */
var code = [ "function(){",
/* call table_to_book on first table */
"var wb = XLSX.utils.table_to_book(document.body.getElementsByTagName('table')[0]);",
var data = fs.read('sheetjs.xlsx', {mode: 'rb', charset: 'utf8'});
var workbook = xlsx.read(data, {type: 'binary'});
data = xlsx.utils.sheet_to_csv(workbook.Sheets['SheetJS']);
console.log("Data: " + data);
/* generate XLSB file and return binary string */
"return XLSX.write(wb, {type: 'binary', bookType: 'xlsb'});",
"}" ].join("");
phantom.exit();
page.open('https://sheetjs.com/demos/table', function() {
console.log("Page Loaded");
/* Load the browser script from the UNPKG CDN */
page.includeJs("https://unpkg.com/xlsx/dist/xlsx.full.min.js", function() {
/* Verify the page is loaded by logging the version number */
var version = "function(){ console.log('Library Version:' + window.XLSX.version); }";
page.evaluateJavaScript(version);
/* The code will return a binary string */
var bin = page.evaluateJavaScript(code);
var workbook = XLSX.read(bin, {type: "binary"});
console.log(XLSX.utils.sheet_to_csv(workbook.Sheets[workbook.SheetNames[0]]));
/* XLSX.writeFile will not work here -- have to write manually */
require("fs").write("phantomjs.xlsb", bin, "wb");
phantom.exit();
});
});

14
demos/headless/puppeteer.js
View File

@ -1,14 +0,0 @@
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto('http://oss.sheetjs.com/sheetjs/tests/', {waitUntil: 'load'});
await page.waitFor(30*1000);
await page.pdf({path: 'test.pdf', format: 'A4'});
browser.close();
})();

15
demos/headless/slimerjs.js
View File

@ -1,15 +0,0 @@
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
var fs = require('fs');
var xlsx = require('../../dist/xlsx.full.min');
var page = require('webpage').create();
page.open('http://oss.sheetjs.com/sheetjs/tests/', function(status) {
var data = fs.read('sheetjs.xlsx', {mode: 'rb', charset: 'utf8'});
var workbook = xlsx.read(data, {type: 'binary'});
data = xlsx.utils.sheet_to_csv(workbook.Sheets['SheetJS']);
console.log("Data: " + data);
phantom.exit();
});

35
demos/headless/test.html Normal file
View File

@ -0,0 +1,35 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>SheetJS Table Export</title>
</head>
<body>
<table id="data-table">
<tr>
<td id="data-table-A1"><span contenteditable="true">SheetJS</span></td>
<td id="data-table-B1"><span contenteditable="true">Table</span></td>
<td id="data-table-C1"><span contenteditable="true">Export</span></td>
<td id="data-table-D1"><span contenteditable="true">Test</span></td>
</tr>
<tr>
<td id="data-table-A2"><span contenteditable="true">&#xBB5;&#xBA3;&#xB95;&#xBCD;&#xB95;&#xBAE;&#xBCD;</span></td>
<td id="data-table-B2"><span contenteditable="true">&#xE2A;&#xE27;&#xE31;&#xE2A;&#xE14;&#xE35;</span></td>
<td id="data-table-C2"><span contenteditable="true">&#x4F60;&#x597D;</span></td>
<td id="data-table-D2"><span contenteditable="true">&#xAC00;&#xC9C0;&#xB9C8;</span></td>
</tr>
<tr>
<td id="data-table-A3"><span contenteditable="true">1</span></td>
<td id="data-table-B3"><span contenteditable="true">2</span></td>
<td id="data-table-C3"><span contenteditable="true">3</span></td>
<td id="data-table-D3"><span contenteditable="true">4</span></td>
</tr>
<tr>
<td id="data-table-A4"><span contenteditable="true">Click</span></td>
<td id="data-table-B4"><span contenteditable="true">to</span></td>
<td id="data-table-C4"><span contenteditable="true">edit</span></td>
<td id="data-table-D4"><span contenteditable="true">cells</span></td>
</tr>
</table>
</body>
</html>

1
demos/headless/xlsx.full.min.js vendored Symbolic link
View File

@ -0,0 +1 @@
../../dist/xlsx.full.min.js

1
docbits/13_usage.md
View File

@ -48,7 +48,6 @@ and approaches for steps 1 and 5.
Utility functions help with step 3.
### The Zen of SheetJS
_Data processing should fit in any workflow_

8
docbits/20_import.md
View File

@ -2,7 +2,7 @@
### Parsing Workbooks
#### API
**API**
_Extract data from spreadsheet bytes_
@ -27,7 +27,7 @@ security risk), and attempts to read files in this way will throw an error.
The second `opts` argument is optional. ["Parsing Options"](#parsing-options)
covers the supported properties and behaviors.
#### Examples
**Examples**
Here are a few common scenarios (click on each subtitle to see the code):
@ -42,7 +42,7 @@ var XLSX = require("xlsx");
var workbook = XLSX.readFile("test.xlsx");
```
For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
should be used to read the file data as a `Buffer` for use with `XLSX.read`:
```js
@ -423,5 +423,3 @@ const workbook = XLSX.read(data);
</details>
More detailed examples are covered in the [included demos](demos/)

169
docbits/22_ingress.md
View File

@ -23,7 +23,7 @@ The third argument specifies the desired worksheet name. Multiple worksheets can
be added to a workbook by calling the function multiple times.
#### API
**API**
_Create a worksheet from an array of arrays of JS values_
@ -61,17 +61,68 @@ control the column order and header output.
["Array of Objects Input"](#array-of-arrays-input) describes the function and
the optional `opts` argument in more detail.
#### Examples
**Examples**
["Zen of SheetJS"](#the-zen-of-sheetjs) contains a detailed example "Get Data
from a JSON Endpoint and Generate a Workbook"
[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
data grid for previewing and modifying structured data in the web browser. The
[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
`xtos` function for converting from x-spreadsheet data object to a workbook.
<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
<details>
<summary><b>Records from a database query (SQL or no-SQL)</b> (click to show)</summary>
The [`database` demo](/demos/database/) includes examples of working with
databases and query results.
</details>
<details>
<summary><b>Numerical Computations with TensorFlow.js</b> (click to show)</summary>
[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
arrays, well-suited for worksheets where each column is a data vector. That is
the transpose of how most people use spreadsheets, where each row is a vector.
When recovering data from `tfjs`, the returned data points are stored in a typed
array. An array of arrays can be constructed with loops. `Array#unshift` can
prepend a title row before the conversion:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
/* suppose xs and ys are vectors (1D tensors) -> tfarr will be a typed array */
const tfdata = tf.stack([xs, ys]).transpose();
const shape = tfdata.shape;
const tfarr = tfdata.dataSync();
/* construct the array of arrays */
const aoa = [];
for(let j = 0; j < shape[0]; ++j) {
aoa[j] = [];
for(let i = 0; i < shape[1]; ++i) aoa[j][i] = tfarr[j * shape[1] + i];
}
/* add headers to the top */
aoa.unshift(["x", "y"]);
/* generate worksheet */
const worksheet = XLSX.utils.aoa_to_sheet(aoa);
```
The [`array` demo](demos/array/) shows a complete example.
</details>
### Processing HTML Tables
#### API
**API**
_Create a worksheet by scraping an HTML TABLE in the page_
@ -99,7 +150,7 @@ The options argument supports the same options as `table_to_sheet`, with the
addition of a `sheet` property to control the worksheet name. If the property
is missing or no options are specified, the default name `Sheet1` is used.
#### Examples
**Examples**
Here are a few common scenarios (click on each subtitle to see the code):
@ -180,3 +231,113 @@ chrome.runtime.onMessage.addListener(function(msg, sender, cb) {
</details>
<details>
<summary><b>Server-Side HTML Tables with Headless Chrome</b> (click to show)</summary>
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks. The core idea is to add the script to the page, parse
the table in the page context, generate a `base64` workbook and send it back
for further processing:
```js
const XLSX = require("xlsx");
const { readFileSync } = require("fs"), puppeteer = require("puppeteer");
const url = `https://sheetjs.com/demos/table`;
/* get the standalone build source (node_modules/xlsx/dist/xlsx.full.min.js) */
const lib = readFileSync(require.resolve("xlsx/dist/xlsx.full.min.js"), "utf8");
(async() => {
/* start browser and go to web page */
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto(url, {waitUntil: "networkidle2"});
/* inject library */
await page.addScriptTag({content: lib});
/* this function `s5s` will be called by the script below, receiving the Base64-encoded file */
await page.exposeFunction("s5s", async(b64) => {
const workbook = XLSX.read(b64, {type: "base64" });
/* DO SOMETHING WITH workbook HERE */
});
/* generate XLSB file in webpage context and send back result */
await page.addScriptTag({content: `
/* call table_to_book on first table */
var workbook = XLSX.utils.table_to_book(document.querySelector("TABLE"));
/* generate XLSX file */
var b64 = XLSX.write(workbook, {type: "base64", bookType: "xlsb"});
/* call "s5s" hook exposed from the node process */
window.s5s(b64);
`});
/* cleanup */
await browser.close();
})();
```
</details>
<details>
<summary><b>Server-Side HTML Tables with Headless WebKit</b> (click to show)</summary>
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). The core idea
is to add the script to the page, parse the table in the page context, generate
a `binary` workbook and send it back for further processing:
```js
var XLSX = require('xlsx');
var page = require('webpage').create();
/* this code will be run in the page */
var code = [ "function(){",
/* call table_to_book on first table */
"var wb = XLSX.utils.table_to_book(document.body.getElementsByTagName('table')[0]);",
/* generate XLSB file and return binary string */
"return XLSX.write(wb, {type: 'binary', bookType: 'xlsb'});",
"}" ].join("");
page.open('https://sheetjs.com/demos/table', function() {
/* Load the browser script from the UNPKG CDN */
page.includeJs("https://unpkg.com/xlsx/dist/xlsx.full.min.js", function() {
/* The code will return an XLSB file encoded as binary string */
var bin = page.evaluateJavaScript(code);
var workbook = XLSX.read(bin, {type: "binary"});
/* DO SOMETHING WITH workbook HERE */
phantom.exit();
});
});
```
</details>
<details>
<summary><b>NodeJS HTML Tables without a browser</b> (click to show)</summary>
NodeJS does not include a DOM implementation and Puppeteer requires a hefty
Chromium build. [`jsdom`](https://npm.im/jsdom) is a lightweight alternative:
```js
const XLSX = require("xlsx");
const { readFileSync } = require("fs");
const { JSDOM } = require("jsdom");
/* obtain HTML string. This example reads from test.html */
const html_str = fs.readFileSync("test.html", "utf8");
/* get first TABLE element */
const doc = new JSDOM(html_str).window.document.querySelector("table");
/* generate workbook */
const workbook = XLSX.utils.table_to_book(doc);
```
</details>

213
docbits/30_export.md
View File

@ -1,34 +1,79 @@
## Writing Workbooks
## Packaging and Releasing Data
For writing, the first step is to generate output data. The helper functions
`write` and `writeFile` will produce the data in various formats suitable for
dissemination. The second step is to actual share the data with the end point.
Assuming `workbook` is a workbook object:
### Writing Workbooks
<details>
<summary><b>nodejs write a file</b> (click to show)</summary>
**API**
`XLSX.writeFile` uses `fs.writeFileSync` in server environments:
_Generate spreadsheet bytes (file) from data_
```js
if(typeof require !== 'undefined') XLSX = require('xlsx');
var data = XLSX.write(workbook, opts);
```
The `write` method attempts to package data from the workbook into a file in
memory. By default, XLSX files are generated, but that can be controlled with
the `bookType` property of the `opts` argument. Based on the `type` option,
the data can be stored as a "binary string", JS string, `Uint8Array` or Buffer.
The second `opts` argument is required. ["Writing Options"](#writing-options)
covers the supported properties and behaviors.
_Generate and attempt to save file_
```js
XLSX.writeFile(workbook, filename, opts);
```
The `writeFile` method packages the data and attempts to save the new file. The
export file format is determined by the extension of `filename` (`SheetJS.xlsx`
signals XLSX export, `SheetJS.xlsb` signals XLSB export, etc).
The `writeFile` method uses platform-specific APIs to initiate the file save. In
NodeJS, `fs.readFileSync` can create a file. In the web browser, a download is
attempted using the HTML5 `download` attribute, with fallbacks for IE.
The second `opts` argument is optional. ["Writing Options"](#writing-options)
covers the supported properties and behaviors.
**Examples**
<details>
<summary><b>Local file in a NodeJS server</b> (click to show)</summary>
`writeFile` uses `fs.writeFileSync` in server environments:
```js
var XLSX = require("xlsx");
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsb');
/* at this point, out.xlsb is a file that you can distribute */
XLSX.writeFile(workbook, "out.xlsb");
```
For Node ESM, the `writeFile` helper is not enabled. Instead, `fs.writeFileSync`
should be used to write the file data to a `Buffer` for use with `XLSX.write`:
```js
import { writeFileSync } from "fs";
import { write } from "xlsx/xlsx.mjs";
const buf = write(workbook, {type: "buffer", bookType: "xlsb"});
/* buf is a Buffer */
const workbook = writeFileSync("out.xlsb", buf);
```
</details>
<details>
<summary><b>Photoshop ExtendScript write a file</b> (click to show)</summary>
<summary><b>Local file in a PhotoShop or InDesign plugin</b> (click to show)</summary>
`writeFile` wraps the `File` logic in Photoshop and other ExtendScript targets.
The specified path should be an absolute path:
```js
#include "xlsx.extendscript.js"
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsx');
XLSX.writeFile(workbook, "out.xlsx");
/* at this point, out.xlsx is a file that you can distribute */
```
@ -37,44 +82,7 @@ The [`extendscript` demo](demos/extendscript/) includes a more complex example.
</details>
<details>
<summary><b>Browser add TABLE element to page</b> (click to show)</summary>
The `sheet_to_html` utility function generates HTML code that can be added to
any DOM element.
```js
var worksheet = workbook.Sheets[workbook.SheetNames[0]];
var container = document.getElementById('tableau');
container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
```
</details>
<details>
<summary><b>Browser upload file (ajax)</b> (click to show)</summary>
A complete example using XHR is [included in the XHR demo](demos/xhr/), along
with examples for fetch and wrapper libraries. This example assumes the server
can handle Base64-encoded files (see the demo for a basic nodejs server):
```js
/* in this example, send a base64 string to the server */
var wopts = { bookType:'xlsx', bookSST:false, type:'base64' };
var wbout = XLSX.write(workbook,wopts);
var req = new XMLHttpRequest();
req.open("POST", "/upload", true);
var formdata = new FormData();
formdata.append('file', 'test.xlsx'); // <-- server expects `file` to hold name
formdata.append('data', wbout); // <-- `data` holds the base64-encoded data
req.send(formdata);
```
</details>
<details>
<summary><b>Browser save file</b> (click to show)</summary>
<summary><b>Download a file in the browser to the user machine</b> (click to show)</summary>
`XLSX.writeFile` wraps a few techniques for triggering a file save:
@ -88,14 +96,14 @@ There is no standard way to determine if the actual file has been downloaded.
```js
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsb');
XLSX.writeFile(workbook, "out.xlsb");
/* at this point, out.xlsb will have been downloaded */
```
</details>
<details>
<summary><b>Browser save file (compatibility)</b> (click to show)</summary>
<summary><b>Download a file in legacy browsers</b> (click to show)</summary>
`XLSX.writeFile` techniques work for most modern browsers as well as older IE.
For much older browsers, there are workarounds implemented by wrapper libraries.
@ -105,7 +113,7 @@ Note: `XLSX.writeFile` will automatically call `saveAs` if available.
```js
/* bookType can be any supported output type */
var wopts = { bookType:'xlsx', bookSST:false, type:'array' };
var wopts = { bookType:"xlsx", bookSST:false, type:"array" };
var wbout = XLSX.write(workbook,wopts);
@ -118,11 +126,11 @@ to generate local files, suitable for environments where ActiveX is unavailable:
```js
Downloadify.create(id,{
/* other options are required! read the downloadify docs for more info */
filename: "test.xlsx",
data: function() { return XLSX.write(wb, {bookType:"xlsx", type:'base64'}); },
append: false,
dataType: 'base64'
/* other options are required! read the downloadify docs for more info */
filename: "test.xlsx",
data: function() { return XLSX.write(wb, {bookType:"xlsx", type:"base64"}); },
append: false,
dataType: "base64"
});
```
@ -130,6 +138,54 @@ The [`oldie` demo](demos/oldie/) shows an IE-compatible fallback scenario.
</details>
<details>
<summary><b>Browser upload file (ajax)</b> (click to show)</summary>
A complete example using XHR is [included in the XHR demo](demos/xhr/), along
with examples for fetch and wrapper libraries. This example assumes the server
can handle Base64-encoded files (see the demo for a basic nodejs server):
```js
/* in this example, send a base64 string to the server */
var wopts = { bookType:"xlsx", bookSST:false, type:"base64" };
var wbout = XLSX.write(workbook,wopts);
var req = new XMLHttpRequest();
req.open("POST", "/upload", true);
var formdata = new FormData();
formdata.append("file", "test.xlsx"); // <-- server expects `file` to hold name
formdata.append("data", wbout); // <-- `data` holds the base64-encoded data
req.send(formdata);
```
</details>
<details>
<summary><b>PhantomJS (Headless Webkit) File Generation</b> (click to show)</summary>
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). PhantomJS
`fs.write` supports writing files from the main process but has a different
interface from the NodeJS `fs` module:
```js
var XLSX = require('xlsx');
var fs = require('fs');
/* generate a binary string */
var bin = XLSX.write(workbook, { type:"binary", bookType: "xlsx" });
/* write to file */
fs.write("test.xlsx", bin, "wb");
```
Note: The section ["Processing HTML Tables"](#processing-html-tables) shows how
to generate a workbook from HTML tables in a page in "Headless WebKit".
</details>
The [included demos](demos/) cover mobile apps and other special deployments.
### Writing Examples
@ -137,3 +193,42 @@ The [included demos](demos/) cover mobile apps and other special deployments.
- <http://sheetjs.com/demos/table.html> exporting an HTML table
- <http://sheetjs.com/demos/writexlsx.html> generates a simple file
### Streaming Write
The streaming write functions are available in the `XLSX.stream` object. They
take the same arguments as the normal write functions but return a Readable
Stream. They are only exposed in NodeJS.
- `XLSX.stream.to_csv` is the streaming version of `XLSX.utils.sheet_to_csv`.
- `XLSX.stream.to_html` is the streaming version of `XLSX.utils.sheet_to_html`.
- `XLSX.stream.to_json` is the streaming version of `XLSX.utils.sheet_to_json`.
<details>
<summary><b>nodejs convert to CSV and write file</b> (click to show)</summary>
```js
var output_file_name = "out.csv";
var stream = XLSX.stream.to_csv(worksheet);
stream.pipe(fs.createWriteStream(output_file_name));
```
</details>
<details>
<summary><b>nodejs write JSON stream to screen</b> (click to show)</summary>
```js
/* to_json returns an object-mode stream */
var stream = XLSX.stream.to_json(worksheet, {raw:true});
/* the following stream converts JS objects to text via JSON.stringify */
var conv = new Transform({writableObjectMode:true});
conv._transform = function(obj, e, cb){ cb(null, JSON.stringify(obj) + "\n"); };
stream.pipe(conv); conv.pipe(process.stdout);
```
</details>
<https://github.com/sheetjs/sheetaki> pipes write streams to nodejs response.

39
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@ -1,39 +0,0 @@
### Streaming Write
The streaming write functions are available in the `XLSX.stream` object. They
take the same arguments as the normal write functions but return a Readable
Stream. They are only exposed in NodeJS.
- `XLSX.stream.to_csv` is the streaming version of `XLSX.utils.sheet_to_csv`.
- `XLSX.stream.to_html` is the streaming version of `XLSX.utils.sheet_to_html`.
- `XLSX.stream.to_json` is the streaming version of `XLSX.utils.sheet_to_json`.
<details>
<summary><b>nodejs convert to CSV and write file</b> (click to show)</summary>
```js
var output_file_name = "out.csv";
var stream = XLSX.stream.to_csv(worksheet);
stream.pipe(fs.createWriteStream(output_file_name));
```
</details>
<details>
<summary><b>nodejs write JSON stream to screen</b> (click to show)</summary>
```js
/* to_json returns an object-mode stream */
var stream = XLSX.stream.to_json(worksheet, {raw:true});
/* the following stream converts JS objects to text via JSON.stringify */
var conv = new Transform({writableObjectMode:true});
conv._transform = function(obj, e, cb){ cb(null, JSON.stringify(obj) + "\n"); };
stream.pipe(conv); conv.pipe(process.stdout);
```
</details>
<https://github.com/sheetjs/sheetaki> pipes write streams to nodejs response.

217
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View File

@ -0,0 +1,217 @@
### Generating JSON and JS Data
JSON and JS data tend to represent single worksheets. The utility functions in
this section work with single worksheets.
The ["Common Spreadsheet Format"](#common-spreadsheet-format) section describes
the object structure in more detail. `workbook.SheetNames` is an ordered list
of the worksheet names. `workbook.Sheets` is an object whose keys are sheet
names and whose values are worksheet objects.
The "first worksheet" is stored at `workbook.Sheets[workbook.SheetNames[0]]`.
**API**
_Create an array of JS objects from a worksheet_
```js
var jsa = XLSX.utils.sheet_to_json(worksheet, opts);
```
_Create an array of arrays of JS values from a worksheet_
```js
var aoa = XLSX.utils.sheet_to_json(worksheet, {...opts, header: 1});
```
The `sheet_to_json` utility function walks a workbook in row-major order,
generating an array of objects. The second `opts` argument controls a number of
export decisions including the type of values (JS values or formatted text). The
["JSON"](#json) section describes the argument in more detail.
By default, `sheet_to_json` scans the first row and uses the values as headers.
With the `header: 1` option, the function exports an array of arrays of values.
**Examples**
[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
data grid for previewing and modifying structured data in the web browser. The
[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
`stox` function for converting from a workbook to x-spreadsheet data object.
<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
<details>
<summary><b>Populating a database (SQL or no-SQL)</b> (click to show)</summary>
The [`database` demo](/demos/database/) includes examples of working with
databases and query results.
</details>
<details>
<summary><b>Numerical Computations with TensorFlow.js</b> (click to show)</summary>
[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
arrays, well-suited for worksheets where each column is a data vector. That is
the transpose of how most people use spreadsheets, where each row is a vector.
A single `Array#map` can pull individual named rows from `sheet_to_json` export:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
const key = "age"; // this is the field we want to pull
const ages = XLSX.utils.sheet_to_json(worksheet).map(r => r[key]);
const tf_data = tf.tensor1d(ages);
```
All fields can be processed at once using a transpose of the 2D tensor generated
with the `sheet_to_json` export with `header: 1`. The first row, if it contains
header labels, should be removed with a slice:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
/* array of arrays of the data starting on the second row */
const aoa = XLSX.utils.sheet_to_json(worksheet, {header: 1}).slice(1);
/* dataset in the "correct orientation" */
const tf_dataset = tf.tensor2d(aoa).transpose();
/* pull out each dataset with a slice */
const tf_field0 = tf_dataset.slice([0,0], [1,tensor.shape[1]]).flatten();
const tf_field1 = tf_dataset.slice([1,0], [1,tensor.shape[1]]).flatten();
```
The [`array` demo](demos/array/) shows a complete example.
</details>
### Generating HTML Tables
**API**
_Generate HTML Table from Worksheet_
```js
var html = XLSX.utils.sheet_to_html(worksheet);
```
The `sheet_to_html` utility function generates HTML code based on the worksheet
data. Each cell in the worksheet is mapped to a `<TD>` element. Merged cells
in the worksheet are serialized by setting `colspan` and `rowspan` attributes.
**Examples**
The `sheet_to_html` utility function generates HTML code that can be added to
any DOM element by setting the `innerHTML`:
```js
var container = document.getElementById("tavolo");
container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
```
Combining with `fetch`, constructing a site from a workbook is straightforward:
<details>
<summary><b>Vanilla JS + HTML fetch workbook and generate table previews</b> (click to show)</summary>
```html
<body>
<style>TABLE { border-collapse: collapse; } TD { border: 1px solid; }</style>
<div id="tavolo"></div>
<script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>
<script type="text/javascript">
(async() => {
/* fetch and parse workbook -- see the fetch example for details */
const workbook = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
let output = [];
/* loop through the worksheet names in order */
workbook.SheetNames.forEach(name => {
/* generate HTML from the corresponding worksheets */
const worksheet = workbook.Sheets[name];
const html = XLSX.utils.sheet_to_html(worksheet);
/* add a header with the title name followed by the table */
output.push(`<H3>${name}</H3>${html}`);
});
/* write to the DOM at the end */
tavolo.innerHTML = output.join("\n");
})();
</script>
</body>
```
</details>
<details>
<summary><b>React fetch workbook and generate HTML table previews</b> (click to show)</summary>
It is generally recommended to use a React-friendly workflow, but it is possible
to generate HTML and use it in React with `dangerouslySetInnerHTML`:
```jsx
function Tabeller(props) {
/* the workbook object is the state */
const [workbook, setWorkbook] = React.useState(XLSX.utils.book_new());
/* fetch and update the workbook with an effect */
React.useEffect(() => { (async() => {
/* fetch and parse workbook -- see the fetch example for details */
const wb = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
setWorkbook(wb);
})(); });
return workbook.SheetNames.map(name => (<>
<h3>name</h3>
<div dangerouslySetInnerHTML={{
/* this __html mantra is needed to set the inner HTML */
__html: XLSX.utils.sheet_to_html(workbook.Sheets[name])
}} />
</>));
}
```
The [`react` demo](demos/react) includes more React examples.
</details>
<details>
<summary><b>VueJS fetch workbook and generate HTML table previews</b> (click to show)</summary>
It is generally recommended to use a VueJS-friendly workflow, but it is possible
to generate HTML and use it in VueJS with the `v-html` directive:
```jsx
import { read, utils } from 'xlsx';
import { reactive } from 'vue';
const S5SComponent = {
mounted() { (async() => {
/* fetch and parse workbook -- see the fetch example for details */
const workbook = read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
/* loop through the worksheet names in order */
workbook.SheetNames.forEach(name => {
/* generate HTML from the corresponding worksheets */
const html = utils.sheet_to_html(workbook.Sheets[name]);
/* add to state */
this.wb.wb.push({ name, html });
});
})(); },
/* this state mantra is required for array updates to work */
setup() { return { wb: reactive({ wb: [] }) }; },
template: `
<div v-for="ws in wb.wb" :key="ws.name">
<h3>{{ ws.name }}</h3>
<div v-html="ws.html"></div>
</div>`
};
```
The [`vuejs` demo](demos/vue) includes more React examples.
</details>

528
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View File

@ -40,19 +40,16 @@ port calculations to web apps; automate common spreadsheet tasks, and much more!
* [JS Ecosystem Demos](#js-ecosystem-demos)
- [Acquiring and Extracting Data](#acquiring-and-extracting-data)
* [Parsing Workbooks](#parsing-workbooks)
+ [API](#api)
+ [Examples](#examples)
* [Processing JSON and JS Data](#processing-json-and-js-data)
+ [API](#api-1)
+ [Examples](#examples-1)
* [Processing HTML Tables](#processing-html-tables)
+ [API](#api-2)
+ [Examples](#examples-2)
- [Working with the Workbook](#working-with-the-workbook)
* [Parsing and Writing Examples](#parsing-and-writing-examples)
- [Writing Workbooks](#writing-workbooks)
- [Packaging and Releasing Data](#packaging-and-releasing-data)
* [Writing Workbooks](#writing-workbooks)
* [Writing Examples](#writing-examples)
* [Streaming Write](#streaming-write)
* [Generating JSON and JS Data](#generating-json-and-js-data)
* [Generating HTML Tables](#generating-html-tables)
- [Interface](#interface)
* [Parsing functions](#parsing-functions)
* [Writing functions](#writing-functions)
@ -249,7 +246,6 @@ and approaches for steps 1 and 5.
Utility functions help with step 3.
### The Zen of SheetJS
_Data processing should fit in any workflow_
@ -508,7 +504,7 @@ Other examples are included in the [showcase](demos/showcase/).
### Parsing Workbooks
#### API
**API**
_Extract data from spreadsheet bytes_
@ -533,7 +529,7 @@ security risk), and attempts to read files in this way will throw an error.
The second `opts` argument is optional. ["Parsing Options"](#parsing-options)
covers the supported properties and behaviors.
#### Examples
**Examples**
Here are a few common scenarios (click on each subtitle to see the code):
@ -546,7 +542,7 @@ var XLSX = require("xlsx");
var workbook = XLSX.readFile("test.xlsx");
```
For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
should be used to read the file data as a `Buffer` for use with `XLSX.read`:
```js
@ -893,8 +889,6 @@ const workbook = XLSX.read(data);
More detailed examples are covered in the [included demos](demos/)
### Processing JSON and JS Data
JSON and JS data tend to represent single worksheets. This section will use a
@ -920,7 +914,7 @@ The third argument specifies the desired worksheet name. Multiple worksheets can
be added to a workbook by calling the function multiple times.
#### API
**API**
_Create a worksheet from an array of arrays of JS values_
@ -958,17 +952,62 @@ control the column order and header output.
["Array of Objects Input"](#array-of-arrays-input) describes the function and
the optional `opts` argument in more detail.
#### Examples
**Examples**
["Zen of SheetJS"](#the-zen-of-sheetjs) contains a detailed example "Get Data
from a JSON Endpoint and Generate a Workbook"
[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
data grid for previewing and modifying structured data in the web browser. The
[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
`xtos` function for converting from x-spreadsheet data object to a workbook.
<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
The [`database` demo](/demos/database/) includes examples of working with
databases and query results.
[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
arrays, well-suited for worksheets where each column is a data vector. That is
the transpose of how most people use spreadsheets, where each row is a vector.
When recovering data from `tfjs`, the returned data points are stored in a typed
array. An array of arrays can be constructed with loops. `Array#unshift` can
prepend a title row before the conversion:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
/* suppose xs and ys are vectors (1D tensors) -> tfarr will be a typed array */
const tfdata = tf.stack([xs, ys]).transpose();
const shape = tfdata.shape;
const tfarr = tfdata.dataSync();
/* construct the array of arrays */
const aoa = [];
for(let j = 0; j < shape[0]; ++j) {
aoa[j] = [];
for(let i = 0; i < shape[1]; ++i) aoa[j][i] = tfarr[j * shape[1] + i];
}
/* add headers to the top */
aoa.unshift(["x", "y"]);
/* generate worksheet */
const worksheet = XLSX.utils.aoa_to_sheet(aoa);
```
The [`array` demo](demos/array/) shows a complete example.
### Processing HTML Tables
#### API
**API**
_Create a worksheet by scraping an HTML TABLE in the page_
@ -996,7 +1035,7 @@ The options argument supports the same options as `table_to_sheet`, with the
addition of a `sheet` property to control the worksheet name. If the property
is missing or no options are specified, the default name `Sheet1` is used.
#### Examples
**Examples**
Here are a few common scenarios (click on each subtitle to see the code):
@ -1071,6 +1110,107 @@ chrome.runtime.onMessage.addListener(function(msg, sender, cb) {
```
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks. The core idea is to add the script to the page, parse
the table in the page context, generate a `base64` workbook and send it back
for further processing:
```js
const XLSX = require("xlsx");
const { readFileSync } = require("fs"), puppeteer = require("puppeteer");
const url = `https://sheetjs.com/demos/table`;
/* get the standalone build source (node_modules/xlsx/dist/xlsx.full.min.js) */
const lib = readFileSync(require.resolve("xlsx/dist/xlsx.full.min.js"), "utf8");
(async() => {
/* start browser and go to web page */
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto(url, {waitUntil: "networkidle2"});
/* inject library */
await page.addScriptTag({content: lib});
/* this function `s5s` will be called by the script below, receiving the Base64-encoded file */
await page.exposeFunction("s5s", async(b64) => {
const workbook = XLSX.read(b64, {type: "base64" });
/* DO SOMETHING WITH workbook HERE */
});
/* generate XLSB file in webpage context and send back result */
await page.addScriptTag({content: `
/* call table_to_book on first table */
var workbook = XLSX.utils.table_to_book(document.querySelector("TABLE"));
/* generate XLSX file */
var b64 = XLSX.write(workbook, {type: "base64", bookType: "xlsb"});
/* call "s5s" hook exposed from the node process */
window.s5s(b64);
`});
/* cleanup */
await browser.close();
})();
```
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). The core idea
is to add the script to the page, parse the table in the page context, generate
a `binary` workbook and send it back for further processing:
```js
var XLSX = require('xlsx');
var page = require('webpage').create();
/* this code will be run in the page */
var code = [ "function(){",
/* call table_to_book on first table */
"var wb = XLSX.utils.table_to_book(document.body.getElementsByTagName('table')[0]);",
/* generate XLSB file and return binary string */
"return XLSX.write(wb, {type: 'binary', bookType: 'xlsb'});",
"}" ].join("");
page.open('https://sheetjs.com/demos/table', function() {
/* Load the browser script from the UNPKG CDN */
page.includeJs("https://unpkg.com/xlsx/dist/xlsx.full.min.js", function() {
/* The code will return an XLSB file encoded as binary string */
var bin = page.evaluateJavaScript(code);
var workbook = XLSX.read(bin, {type: "binary"});
/* DO SOMETHING WITH workbook HERE */
phantom.exit();
});
});
```
NodeJS does not include a DOM implementation and Puppeteer requires a hefty
Chromium build. [`jsdom`](https://npm.im/jsdom) is a lightweight alternative:
```js
const XLSX = require("xlsx");
const { readFileSync } = require("fs");
const { JSDOM } = require("jsdom");
/* obtain HTML string. This example reads from test.html */
const html_str = fs.readFileSync("test.html", "utf8");
/* get first TABLE element */
const doc = new JSDOM(html_str).window.document.querySelector("table");
/* generate workbook */
const workbook = XLSX.utils.table_to_book(doc);
```
## Working with the Workbook
The full object format is described later in this README.
@ -1145,21 +1285,65 @@ Some helper functions in `XLSX.utils` generate different views of the sheets:
- `XLSX.utils.sheet_to_json` generates an array of objects
- `XLSX.utils.sheet_to_formulae` generates a list of formulae
## Writing Workbooks
## Packaging and Releasing Data
For writing, the first step is to generate output data. The helper functions
`write` and `writeFile` will produce the data in various formats suitable for
dissemination. The second step is to actual share the data with the end point.
Assuming `workbook` is a workbook object:
### Writing Workbooks
**API**
`XLSX.writeFile` uses `fs.writeFileSync` in server environments:
_Generate spreadsheet bytes (file) from data_
```js
if(typeof require !== 'undefined') XLSX = require('xlsx');
var data = XLSX.write(workbook, opts);
```
The `write` method attempts to package data from the workbook into a file in
memory. By default, XLSX files are generated, but that can be controlled with
the `bookType` property of the `opts` argument. Based on the `type` option,
the data can be stored as a "binary string", JS string, `Uint8Array` or Buffer.
The second `opts` argument is required. ["Writing Options"](#writing-options)
covers the supported properties and behaviors.
_Generate and attempt to save file_
```js
XLSX.writeFile(workbook, filename, opts);
```
The `writeFile` method packages the data and attempts to save the new file. The
export file format is determined by the extension of `filename` (`SheetJS.xlsx`
signals XLSX export, `SheetJS.xlsb` signals XLSB export, etc).
The `writeFile` method uses platform-specific APIs to initiate the file save. In
NodeJS, `fs.readFileSync` can create a file. In the web browser, a download is
attempted using the HTML5 `download` attribute, with fallbacks for IE.
The second `opts` argument is optional. ["Writing Options"](#writing-options)
covers the supported properties and behaviors.
**Examples**
`writeFile` uses `fs.writeFileSync` in server environments:
```js
var XLSX = require("xlsx");
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsb');
/* at this point, out.xlsb is a file that you can distribute */
XLSX.writeFile(workbook, "out.xlsb");
```
For Node ESM, the `writeFile` helper is not enabled. Instead, `fs.writeFileSync`
should be used to write the file data to a `Buffer` for use with `XLSX.write`:
```js
import { writeFileSync } from "fs";
import { write } from "xlsx/xlsx.mjs";
const buf = write(workbook, {type: "buffer", bookType: "xlsb"});
/* buf is a Buffer */
const workbook = writeFileSync("out.xlsb", buf);
```
@ -1169,8 +1353,9 @@ The specified path should be an absolute path:
```js
#include "xlsx.extendscript.js"
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsx');
XLSX.writeFile(workbook, "out.xlsx");
/* at this point, out.xlsx is a file that you can distribute */
```
@ -1178,37 +1363,6 @@ The [`extendscript` demo](demos/extendscript/) includes a more complex example.
The `sheet_to_html` utility function generates HTML code that can be added to
any DOM element.
```js
var worksheet = workbook.Sheets[workbook.SheetNames[0]];
var container = document.getElementById('tableau');
container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
```
A complete example using XHR is [included in the XHR demo](demos/xhr/), along
with examples for fetch and wrapper libraries. This example assumes the server
can handle Base64-encoded files (see the demo for a basic nodejs server):
```js
/* in this example, send a base64 string to the server */
var wopts = { bookType:'xlsx', bookSST:false, type:'base64' };
var wbout = XLSX.write(workbook,wopts);
var req = new XMLHttpRequest();
req.open("POST", "/upload", true);
var formdata = new FormData();
formdata.append('file', 'test.xlsx'); // <-- server expects `file` to hold name
formdata.append('data', wbout); // <-- `data` holds the base64-encoded data
req.send(formdata);
```
`XLSX.writeFile` wraps a few techniques for triggering a file save:
- `URL` browser API creates an object URL for the file, which the library uses
@ -1221,7 +1375,7 @@ There is no standard way to determine if the actual file has been downloaded.
```js
/* output format determined by filename */
XLSX.writeFile(workbook, 'out.xlsb');
XLSX.writeFile(workbook, "out.xlsb");
/* at this point, out.xlsb will have been downloaded */
```
@ -1235,7 +1389,7 @@ Note: `XLSX.writeFile` will automatically call `saveAs` if available.
```js
/* bookType can be any supported output type */
var wopts = { bookType:'xlsx', bookSST:false, type:'array' };
var wopts = { bookType:"xlsx", bookSST:false, type:"array" };
var wbout = XLSX.write(workbook,wopts);
@ -1248,17 +1402,59 @@ to generate local files, suitable for environments where ActiveX is unavailable:
```js
Downloadify.create(id,{
/* other options are required! read the downloadify docs for more info */
filename: "test.xlsx",
data: function() { return XLSX.write(wb, {bookType:"xlsx", type:'base64'}); },
append: false,
dataType: 'base64'
/* other options are required! read the downloadify docs for more info */
filename: "test.xlsx",
data: function() { return XLSX.write(wb, {bookType:"xlsx", type:"base64"}); },
append: false,
dataType: "base64"
});
```
The [`oldie` demo](demos/oldie/) shows an IE-compatible fallback scenario.
A complete example using XHR is [included in the XHR demo](demos/xhr/), along
with examples for fetch and wrapper libraries. This example assumes the server
can handle Base64-encoded files (see the demo for a basic nodejs server):
```js
/* in this example, send a base64 string to the server */
var wopts = { bookType:"xlsx", bookSST:false, type:"base64" };
var wbout = XLSX.write(workbook,wopts);
var req = new XMLHttpRequest();
req.open("POST", "/upload", true);
var formdata = new FormData();
formdata.append("file", "test.xlsx"); // <-- server expects `file` to hold name
formdata.append("data", wbout); // <-- `data` holds the base64-encoded data
req.send(formdata);
```
The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). PhantomJS
`fs.write` supports writing files from the main process but has a different
interface from the NodeJS `fs` module:
```js
var XLSX = require('xlsx');
var fs = require('fs');
/* generate a binary string */
var bin = XLSX.write(workbook, { type:"binary", bookType: "xlsx" });
/* write to file */
fs.write("test.xlsx", bin, "wb");
```
Note: The section ["Processing HTML Tables"](#processing-html-tables) shows how
to generate a workbook from HTML tables in a page in "Headless WebKit".
The [included demos](demos/) cover mobile apps and other special deployments.
### Writing Examples
@ -1299,6 +1495,208 @@ stream.pipe(conv); conv.pipe(process.stdout);
<https://github.com/sheetjs/sheetaki> pipes write streams to nodejs response.
### Generating JSON and JS Data
JSON and JS data tend to represent single worksheets. The utility functions in
this section work with single worksheets.
The ["Common Spreadsheet Format"](#common-spreadsheet-format) section describes
the object structure in more detail. `workbook.SheetNames` is an ordered list
of the worksheet names. `workbook.Sheets` is an object whose keys are sheet
names and whose values are worksheet objects.
The "first worksheet" is stored at `workbook.Sheets[workbook.SheetNames[0]]`.
**API**
_Create an array of JS objects from a worksheet_
```js
var jsa = XLSX.utils.sheet_to_json(worksheet, opts);
```
_Create an array of arrays of JS values from a worksheet_
```js
var aoa = XLSX.utils.sheet_to_json(worksheet, {...opts, header: 1});
```
The `sheet_to_json` utility function walks a workbook in row-major order,
generating an array of objects. The second `opts` argument controls a number of
export decisions including the type of values (JS values or formatted text). The
["JSON"](#json) section describes the argument in more detail.
By default, `sheet_to_json` scans the first row and uses the values as headers.
With the `header: 1` option, the function exports an array of arrays of values.
**Examples**
[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
data grid for previewing and modifying structured data in the web browser. The
[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
`stox` function for converting from a workbook to x-spreadsheet data object.
<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
The [`database` demo](/demos/database/) includes examples of working with
databases and query results.
[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
arrays, well-suited for worksheets where each column is a data vector. That is
the transpose of how most people use spreadsheets, where each row is a vector.
A single `Array#map` can pull individual named rows from `sheet_to_json` export:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
const key = "age"; // this is the field we want to pull
const ages = XLSX.utils.sheet_to_json(worksheet).map(r => r[key]);
const tf_data = tf.tensor1d(ages);
```
All fields can be processed at once using a transpose of the 2D tensor generated
with the `sheet_to_json` export with `header: 1`. The first row, if it contains
header labels, should be removed with a slice:
```js
const XLSX = require("xlsx");
const tf = require('@tensorflow/tfjs');
/* array of arrays of the data starting on the second row */
const aoa = XLSX.utils.sheet_to_json(worksheet, {header: 1}).slice(1);
/* dataset in the "correct orientation" */
const tf_dataset = tf.tensor2d(aoa).transpose();
/* pull out each dataset with a slice */
const tf_field0 = tf_dataset.slice([0,0], [1,tensor.shape[1]]).flatten();
const tf_field1 = tf_dataset.slice([1,0], [1,tensor.shape[1]]).flatten();
```
The [`array` demo](demos/array/) shows a complete example.
### Generating HTML Tables
**API**
_Generate HTML Table from Worksheet_
```js
var html = XLSX.utils.sheet_to_html(worksheet);
```
The `sheet_to_html` utility function generates HTML code based on the worksheet
data. Each cell in the worksheet is mapped to a `<TD>` element. Merged cells
in the worksheet are serialized by setting `colspan` and `rowspan` attributes.
**Examples**
The `sheet_to_html` utility function generates HTML code that can be added to
any DOM element by setting the `innerHTML`:
```js
var container = document.getElementById("tavolo");
container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
```
Combining with `fetch`, constructing a site from a workbook is straightforward:
```html
<body>
<style>TABLE { border-collapse: collapse; } TD { border: 1px solid; }</style>
<div id="tavolo"></div>
<script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>
<script type="text/javascript">
(async() => {
/* fetch and parse workbook -- see the fetch example for details */
const workbook = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
let output = [];
/* loop through the worksheet names in order */
workbook.SheetNames.forEach(name => {
/* generate HTML from the corresponding worksheets */
const worksheet = workbook.Sheets[name];
const html = XLSX.utils.sheet_to_html(worksheet);
/* add a header with the title name followed by the table */
output.push(`<H3>${name}</H3>${html}`);
});
/* write to the DOM at the end */
tavolo.innerHTML = output.join("\n");
})();
</script>
</body>
```
It is generally recommended to use a React-friendly workflow, but it is possible
to generate HTML and use it in React with `dangerouslySetInnerHTML`:
```jsx
function Tabeller(props) {
/* the workbook object is the state */
const [workbook, setWorkbook] = React.useState(XLSX.utils.book_new());
/* fetch and update the workbook with an effect */
React.useEffect(() => { (async() => {
/* fetch and parse workbook -- see the fetch example for details */
const wb = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
setWorkbook(wb);
})(); });
return workbook.SheetNames.map(name => (<>
<h3>name</h3>
<div dangerouslySetInnerHTML={{
/* this __html mantra is needed to set the inner HTML */
__html: XLSX.utils.sheet_to_html(workbook.Sheets[name])
}} />
</>));
}
```
The [`react` demo](demos/react) includes more React examples.
It is generally recommended to use a VueJS-friendly workflow, but it is possible
to generate HTML and use it in VueJS with the `v-html` directive:
```jsx
import { read, utils } from 'xlsx';
import { reactive } from 'vue';
const S5SComponent = {
mounted() { (async() => {
/* fetch and parse workbook -- see the fetch example for details */
const workbook = read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
/* loop through the worksheet names in order */
workbook.SheetNames.forEach(name => {
/* generate HTML from the corresponding worksheets */
const html = utils.sheet_to_html(workbook.Sheets[name]);
/* add to state */
this.wb.wb.push({ name, html });
});
})(); },
/* this state mantra is required for array updates to work */
setup() { return { wb: reactive({ wb: [] }) }; },
template: `
<div v-for="ws in wb.wb" :key="ws.name">
<h3>{{ ws.name }}</h3>
<div v-html="ws.html"></div>
</div>`
};
```
The [`vuejs` demo](demos/vue) includes more React examples.
## Interface
`XLSX` is the exposed variable in the browser and the exported node variable

11
misc/docs/SUMMARY.md
View File

@ -8,19 +8,16 @@
* [JS Ecosystem Demos](README.md#js-ecosystem-demos)
- [Acquiring and Extracting Data](README.md#acquiring-and-extracting-data)
* [Parsing Workbooks](README.md#parsing-workbooks)
+ [API](README.md#api)
+ [Examples](README.md#examples)
* [Processing JSON and JS Data](README.md#processing-json-and-js-data)
+ [API](README.md#api-1)
+ [Examples](README.md#examples-1)
* [Processing HTML Tables](README.md#processing-html-tables)
+ [API](README.md#api-2)
+ [Examples](README.md#examples-2)
- [Working with the Workbook](README.md#working-with-the-workbook)
* [Parsing and Writing Examples](README.md#parsing-and-writing-examples)
- [Writing Workbooks](README.md#writing-workbooks)
- [Packaging and Releasing Data](README.md#packaging-and-releasing-data)
* [Writing Workbooks](README.md#writing-workbooks)
* [Writing Examples](README.md#writing-examples)
* [Streaming Write](README.md#streaming-write)
* [Generating JSON and JS Data](README.md#generating-json-and-js-data)
* [Generating HTML Tables](README.md#generating-html-tables)
- [Interface](README.md#interface)
* [Parsing functions](README.md#parsing-functions)
* [Writing functions](README.md#writing-functions)

4
types/index.d.ts vendored
View File

@ -22,7 +22,7 @@ export function writeFile(data: WorkBook, filename: string, opts?: WritingOption
type CBFunc = () => void;
export function writeFileAsync(filename: string, data: WorkBook, opts: WritingOptions | CBFunc, cb?: CBFunc): any;
/** Attempts to write the workbook data */
export function write(data: WorkBook, opts?: WritingOptions): any;
export function write(data: WorkBook, opts: WritingOptions): any;
/** Utility Functions */
export const utils: XLSX$Utils;
@ -261,7 +261,7 @@ export interface WorkBook {
Props?: FullProperties;
/** Custom workbook Properties */
Custprops?: any;
Custprops?: object;
Workbook?: WBProps;